Whatever the evolutionary basis of religion, the xenophobia it now generates is clearly maladaptive.

It really is the most poetic thing I know about physics: you are all stardust.

Discerning the merits of competing claims is where the empirical basis of science should play a role. I cannot stress often enough that what science is all about is not proving things to be true but proving them to be false. What fails the test of empirical reality, as determined by observation and experiment, gets thrown out like yesterday's newspaper.

You shouldn't be afraid of science. Accepting the reality of nature makes life more exciting and even more precious.

Empty space is a boiling, bubbling brew of virtual particles that pop in and out of existence in a time scale so short that you can't even measure them.

People are interested in science, but they don't always know they're interested in science, and so I try to find a way to get them interested.

For many, to live in a universe that may have no purpose, and no creator, is unthinkable.